[NTG-context] Very strange error:

After I run context (LMTX version) to my document (attached) I get this error: tex error > tex error on line 540 in file ./dev.tex: The file ended when scanning an argument. I don't know how to start... Can anyone help me? Thanks, Xavier PS: I receive this error after upgrading to MKIV to LMTX. Before with MKIV I get no errors.